CN211144525U - Water stopping structure of shield tunnel segment in middle air shaft - Google Patents
Water stopping structure of shield tunnel segment in middle air shaft Download PDFInfo
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- CN211144525U CN211144525U CN201921652738.0U CN201921652738U CN211144525U CN 211144525 U CN211144525 U CN 211144525U CN 201921652738 U CN201921652738 U CN 201921652738U CN 211144525 U CN211144525 U CN 211144525U
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Abstract
The utility model provides a shield tunnel section of jurisdiction's stagnant water structure in middle wind well, including the wind well and pass two shield tunnels of wind well side by side, the upper portion of shield tunnel has the ventilation hole in the wind well, and the region between wind well structure and the shield tunnel section of jurisdiction all has the horizontal plate, the height of horizontal plate is less than a little the height in ventilation hole, the arc shield tunnel section of jurisdiction that wind well headwall department protrusion above the horizontal plate adopts the form of evagination ring beam to be connected with corresponding wind well headwall, the cold joint between horizontal plate and wind well structure and the shield tunnel section of jurisdiction all adopts stagnant water device to carry out the stagnant water. The utility model discloses guarantee that lower part soil body and groundwater can't gush into horizontal plate upper portion space and inside the tunnel to play and reduce in the windshaft the risk that soil body excavation, section of jurisdiction demolish and the post-construction watering ring roof beam, and need not demolish all shield tunnel sections of jurisdiction in the windshaft, construction convenience.
Description
Technical Field
The utility model relates to a building engineering field especially relates to a shield tunnel section of jurisdiction's stagnant water structure in middle air shaft.
Background
In order to meet the requirements of ventilation and smoke exhaust in the long and large interval, a middle air shaft is often arranged in the long and large interval. And the shield passes through the middle air shaft, which is a great risk point in the shield construction process. In order to reduce the risk of the shield passing through the middle air shaft in the engineering, the air shaft enclosure structure is sometimes adopted to reserve the shield passing condition (the air shaft enclosure ground connecting wall adopts glass fiber ribs at the shield passing section), and meanwhile, the shield passes through after the earth is backfilled in the air shaft structure. Although the risk that the shield passes through the middle air shaft can be effectively reduced by the mode, sometimes, underground water often permeates into the air shaft from the outer side of the duct piece when soil bodies in the vertical range of the air shaft are excavated and the duct piece is dismantled, and then water is rushed into the assembled shield tunnel to cause great engineering risk.
Therefore, a construction method for dismantling shield tunnel segments in an intermediate air shaft, which is convenient to construct, safe and reliable, is urgently needed, so that water leakage possibly occurring in the interval air shaft cannot become a factor for restricting engineering design and construction.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a shield tunnel section of jurisdiction's stagnant water structure in middle wind well aims at being used for solving the current shield tunnel and passes through behind the middle wind well envelope section of jurisdiction outside and envelope space the construction problem that can't effectively block up groundwater possibly appear.
The utility model discloses a realize like this:
the utility model provides a shield tunnel section of jurisdiction's stagnant water structure in middle wind well, including the wind well and pass two shield tunnels of wind well side by side, the upper portion of shield tunnel has the ventilation hole in the wind well, and the region between wind well structure and the shield tunnel section of jurisdiction all has the horizontal plate, the height of horizontal plate is less than a little the height in ventilation hole, the arc shield tunnel section of jurisdiction that wind well headwall department protrusion above the horizontal plate adopts the form and the corresponding wind well headwall of evagination ring beam to be connected, cold joint between horizontal plate and wind well structure and the shield tunnel section of jurisdiction all adopts watertight fittings to carry out the stagnant water.
And further, the air shaft structures adjacent to the horizontal plates and the shield tunnel pipe sections are respectively provided with embedded steel bars which are connected with the corresponding horizontal plates.
Furthermore, two shield tunnels in the air shaft are connected by adopting an integral horizontal plate.
Furthermore, the embedded ribs are connected with the outer convex ring beam in the air shaft end wall and the arc shield tunnel segment.
Furthermore, the outer convex ring beam and the horizontal plate are poured at one time, and the circumferential reinforcing steel bars of the outer convex ring beam are anchored into the corresponding horizontal plate.
Furthermore, the water stopping device adopts a form that a water-swelling rubber water stopping strip is matched with a pre-buried grouting pipe.
Furthermore, the shield tunnel segment in the air shaft and part of the shield tunnel segments at two ends of the air shaft are tensioned through the section steel.
Compared with the prior art, the utility model discloses following beneficial effect has:
the utility model provides a stagnant water structure of shield tunnel section of jurisdiction in middle wind well, carry out the local cutting through the section of jurisdiction to shield tunnel upper portion in the wind well and demolish and form the ventilation hole, through horizontal plate sealing connection between wind well structure and the section of jurisdiction, guarantee that lower part soil body and groundwater can't gush into horizontal plate upper portion space and inside the tunnel to play the risk that reduces the interior soil body excavation of wind well, the section of jurisdiction demolishs and constructs the back watering ring roof beam, and need not demolish all shield tunnel sections of jurisdiction in the wind well, construction convenience. The utility model discloses can satisfy the interval air shaft construction of different grade type section of jurisdiction, foundation ditch degree of depth, solve the shield and passed through the serious condition of percolating water phenomenon when the section of jurisdiction is demolishd behind the air shaft, to the scheme formulation, safe construction, the control risk has good effect. Especially, the method has great applicability and certain social and economic benefits when the construction conditions of the interval air shaft are limited and the water leakage of the air duct is serious.
Drawings
Fig. 1 is a schematic plan view of a shield tunnel segment in an intermediate air shaft according to an embodiment of the present invention;
fig. 2 is a schematic cross-sectional view of a shield tunnel segment in an intermediate air shaft according to an embodiment of the present invention;
fig. 3 is a cross-sectional view of a temporary tube sheet support according to an embodiment of the present invention.
Description of reference numerals: 1-shield tunnel, 2-air shaft side wall, 3-air shaft end wall, 4-intermediate wall, 5-vent hole, 6-horizontal plate and 7-convex ring beam.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
As shown in fig. 1 and 2, the embodiment of the present invention further provides a water stop structure for shield tunnel segments in an intermediate air shaft, which comprises an air shaft and two shield tunnels 1 passing through the air shaft side by side, wherein the upper portion of the shield tunnel 1 in the air shaft is provided with vent holes 5, the areas between the air shaft structure and the shield tunnel segments are provided with horizontal plates 6, the height of the horizontal plate 6 is slightly lower than that of the vent holes 5, shield tunnel segments protruding above the horizontal plate 6 at the air shaft end wall 3 are connected with the corresponding air shaft end wall 3 in the form of an outward convex ring beam 7, all the outward convex segments are completely wrapped by the outward convex ring beam 7 to prevent water leakage between the shield tunnel segments and the air shaft end wall 3, the cold joints between the horizontal plate 6 and the air shaft structure and between the horizontal plate and the shield tunnel segment are sealed by water sealing devices, so that water leakage between the horizontal plate 6 and the air shaft structure and between the horizontal plate and the shield tunnel segment is prevented.
The embodiment of the utility model provides a stagnant water structure of shield tunnel section of jurisdiction in this kind of middle wind well, carry out the local cutting through the section of jurisdiction to shield tunnel upper portion in the wind well and demolish and form the ventilation hole, through horizontal plate sealing connection between wind well structure and the section of jurisdiction, guarantee that lower part soil body and groundwater can't gush into horizontal plate upper portion space and inside the tunnel to play the risk that reduces in the wind well soil body excavation, the section of jurisdiction is demolishd and is under construction the back watering ring roof beam, and need not demolish all shield tunnel sections of jurisdiction in the wind well, construction convenience. The utility model discloses can satisfy the interval air shaft construction of different grade type section of jurisdiction, foundation ditch degree of depth, solve the shield and passed through the serious condition of percolating water phenomenon when the section of jurisdiction is demolishd behind the air shaft, to the scheme formulation, safe construction, the control risk has good effect. Especially, the method has great applicability and certain social and economic benefits when the construction conditions of the interval air shaft are limited and the water leakage of the air duct is serious.
Further preferably, the air shaft side wall 2 adjacent to the horizontal plate 6 and the shield tunnel segment are respectively provided with embedded steel bars which are connected with the corresponding horizontal plate 6.
Further preferably, two shield tunnels 1 in the air shaft are connected by adopting an integral horizontal plate 6, so that the connection strength is increased, and the horizontal plate 6 is reliably connected with the air shaft side wall 2 and the existing pipe piece. Wherein, the side wall 2 of the air shaft can be roughened firstly and then the ribs are planted.
Further preferably, the two shield tunnels 1 are connected by adopting an integral horizontal plate 6 through an intermediate wall 4 positioned between the two shield tunnels 1 in the chisel ventilation well, so that water seepage gaps are reduced.
Further preferably, the embedded ribs in the air shaft end wall 3 and the arc shield tunnel segment are connected with the outer convex ring beam 7, so that the connection strength of the air shaft end wall and the arc shield tunnel segment is increased.
Further preferably, the outer convex ring beam 7 and the horizontal plate 6 are poured at one time, and the circumferential steel bars of the outer convex ring beam 7 are anchored into the corresponding horizontal plate 6, so that water seepage gaps are reduced, and the structure is firmer.
Further preferably, the water stopping device adopts a form that a water-swelling rubber water stopping strip is matched with a pre-buried grouting pipe, and the water stopping effect is good.
Further preferably, as shown in fig. 3, the shield tunnel segments in the air shaft and the shield tunnel segments at two ends of the air shaft are tensioned by the section steel, so that the structure is firmer.
As shown in fig. 1 and fig. 2, the embodiment of the utility model provides a still provide a local method of demolising of shield tunnel section of jurisdiction in middle wind well is used in the process of demolising the interior section of jurisdiction of wind well after shield tunnel 1 passes through the wind well to shield tunnel section of jurisdiction stagnant water structure in the middle wind well of foretell formation, this method includes following step:
1) digging soil on the upper part of the shield tunnel 1 in the wind removing well, and simultaneously digging and grouting to block a water seepage gap between shield tunnel pipe sheets and a wind well end wall 3 through which the shield tunnel pipe sheets penetrate;
2) partially cutting and removing segments on the upper part of the shield tunnel 1 in the air shaft, so as to form a vent hole 5 on the upper part of the shield tunnel 1 in the air shaft; the method can be particularly used for cutting the duct piece in a blocking manner by adopting a diamond rope saw, the cutting range can be the upper positions of two ring duct pieces in the middle, and also can be the upper positions of all ring duct pieces in an air shaft, and the cutting duct pieces need to avoid disturbance and damage to adjacent duct pieces according to the size of the vent holes 5;
3) constructing a horizontal plate 6 in the area between the air shaft structure and the shield tunnel segment, including the area between the air shaft side wall 2 and the shield tunnel segment and the area between the air shaft middle partition wall 4 and the tunnel segment, so as to seal the lower part of the horizontal plate 6, ensure that soil mass and underground water at the lower part cannot flow into the upper space of the horizontal plate 6 and the inside of the tunnel, ensure that the height of the horizontal plate 6 is slightly lower than that of the vent holes 5, and prevent water from permeating from the vent holes 5; meanwhile, the shield tunnel segment protruding above the horizontal plate 6 at the air shaft end wall 3 is connected with the corresponding air shaft end wall 3 in the form of an outward convex ring beam 7, and the outward convex ring beam 7 completely wraps all the outward convex segments, so that water leakage between the shield tunnel segment and the air shaft end wall 3 is further prevented;
4) the cold joint between the horizontal plate 6 and the air shaft structure (including the air shaft side wall 2 and the air shaft end wall 3) and the shield tunnel segment adopts a water stop device to stop water, the water stop device adopts a form that a water-swelling rubber water stop strip is matched with a pre-buried grouting pipe, and the water leakage between the horizontal plate 6 and the air shaft structure and the shield tunnel segment is prevented.
As the optimization of this embodiment, in the whole work progress, constantly take out the interior ponding of blast well and wind channel through open water pump drainage, convenient construction.
Further preferably, as shown in fig. 3, the step 1) further includes, before: the structural steel is adopted to tension and temporarily support the shield tunnel segment in the air shaft and the shield tunnel segments in five rings at two ends of the air shaft, and eight structural steel is arranged together to longitudinally tie along a longitudinal bolt, so that the segment is prevented from being damaged in the construction process.
Further preferably, in the step 3), the air shaft structure adjacent to the horizontal plate 6 and the shield tunnel segment are respectively provided with steel bars and connected with the corresponding horizontal plate 6, so that the connection strength is increased, the horizontal plate 6 is reliably connected with the air shaft structure and the existing segment, and the air shaft side wall 2 can be internally provided with steel bars by chiseling the side wall firstly and then planting the steel bars.
Further preferably, in the step 3), the intermediate wall 4 between the two shield tunnels 1 in the ventilation shaft is chiseled, and the two shield tunnels 1 are connected by adopting an integral horizontal plate 6, so that the water seepage gap is reduced.
Further preferably, in the step 3), the air shaft end wall 3 and the convex shield tunnel segment are connected with the corresponding convex ring beam 7 through bar planting, so that the connection strength is increased.
Further preferably, the outer convex ring beam 7 and the horizontal plate 6 are poured at one time, and the circumferential steel bars of the outer convex ring beam 7 are anchored into the corresponding horizontal plate 6, so that water seepage gaps are reduced, and the structure is firmer.
The embodiment of the utility model provides a shield tunnel section of jurisdiction is demolishd locally in this kind of middle wind well, through carrying out the local cutting to the section of jurisdiction on 1 upper portion of shield tunnel in the wind well and demolishs formation ventilation hole 5, through 6 sealing connection of horizontal plate between wind well structure and the section of jurisdiction, guarantee that the lower part soil body and groundwater can't gush into 6 upper portion spaces of horizontal plate and inside the tunnel, in order to play the soil body excavation in reducing the wind well, the section of jurisdiction is demolishd and is under construction the risk of watering the ring roof beam, and need not demolish all shield tunnel sections of jurisdiction in the wind well, construction convenience. The utility model discloses can satisfy the interval air shaft construction of different grade type section of jurisdiction, foundation ditch degree of depth, solve the shield and passed through the serious condition of percolating water phenomenon when the section of jurisdiction is demolishd behind the air shaft, to the scheme formulation, safe construction, the control risk has good effect. Especially, the method has great applicability and certain social and economic benefits when the construction conditions of the interval air shaft are limited and the water leakage of the air duct is serious.
The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (7)
1. The utility model provides a shield tunnel section of jurisdiction's stagnant water structure in middle wind well which characterized in that: including the air shaft and pass two shield tunnels of air shaft side by side, the upper portion of shield tunnel has the ventilation hole in the air shaft, and the region between air shaft structure and the shield tunnel section of jurisdiction all has the horizontal plate, the height of horizontal plate slightly is less than the height of ventilation hole, air shaft headwall department protrusion are connected with corresponding air shaft headwall in the form that the arc shield tunnel section of jurisdiction of horizontal plate top adopted the evagination ring beam, the cold joint between horizontal plate and air shaft structure and the shield tunnel section of jurisdiction all adopts watertight fittings to carry out the stagnant water.
2. The water stopping structure of the shield tunnel segment in the middle wind well according to claim 1, characterized in that: and the air shaft structure adjacent to the horizontal plate and the shield tunnel pipe sheet are respectively provided with embedded bars which are connected with the corresponding horizontal plate.
3. The water stopping structure of the shield tunnel segment in the middle wind well according to claim 1, characterized in that: two shield tunnels in the wind well are connected by an integral horizontal plate.
4. The water stopping structure of the shield tunnel segment in the middle wind well according to claim 1, characterized in that: and the embedded ribs are connected with the outer convex ring beam in the air shaft end wall and the arc shield tunnel segment.
5. The water stopping structure of the shield tunnel segment in the middle wind well according to claim 1, characterized in that:
the outer convex ring beam and the horizontal plate are poured at one time, and the circumferential reinforcing steel bars of the outer convex ring beam are anchored into the corresponding horizontal plate.
6. The water stopping structure of the shield tunnel segment in the middle wind well according to claim 1, characterized in that: the water stopping device adopts a form that a water-swelling rubber water stopping strip is matched with a pre-buried grouting pipe.
7. The water stopping structure of the shield tunnel segment in the middle wind well according to claim 1, characterized in that: the shield tunnel segment in the air shaft and part of shield tunnel segments at two ends of the air shaft are tensioned through the section steel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921652738.0U CN211144525U (en) | 2019-09-30 | 2019-09-30 | Water stopping structure of shield tunnel segment in middle air shaft |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921652738.0U CN211144525U (en) | 2019-09-30 | 2019-09-30 | Water stopping structure of shield tunnel segment in middle air shaft |
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| CN211144525U true CN211144525U (en) | 2020-07-31 |
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| CN201921652738.0U Active CN211144525U (en) | 2019-09-30 | 2019-09-30 | Water stopping structure of shield tunnel segment in middle air shaft |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110541722A (en) * | 2019-09-30 | 2019-12-06 | 中铁第四勘察设计院集团有限公司 | Partial shield tunnel segment dismantling method and water stop structure in middle air shaft |
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2019
- 2019-09-30 CN CN201921652738.0U patent/CN211144525U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110541722A (en) * | 2019-09-30 | 2019-12-06 | 中铁第四勘察设计院集团有限公司 | Partial shield tunnel segment dismantling method and water stop structure in middle air shaft |
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